I took my whole laptop and a dvd movie and headset. Once they had the chemo all set up and happening I got someone to set up my laptop and plugged it in to one of the many spare outlets behind the chair. I also chatted on face book to a friend. Take water to drink on the way home. My throat got really dry really fast.
Oh and since your first one takes so long and its two sorts, be aware that second bag sitting up there waiting for hours ends up being really cold when its infused to you. I ended up asking for a heat pack to warm it on my arm as it went in and it was loads nicer. ;)